Table 1. Characteristics of participants at baseline.
| Characteristic | Control (n = 1,511) | Cell salvage (n = 1,517) |
|---|---|---|
| Age at randomisation (years) | 31.8 (5.8) | 31.6 (5.7) |
| Preoperative haemoglobin (g/l) | 118.1 (11.5) [19] | 118.4 (11.3) [11] |
| Indication for cesarean1 | ||
| Elective | 687 (45.5%) | 669 (44.1%) |
| Emergency | 824 (54.5%) | 848 (55.9%) |
| Multiple birth1 | ||
| Singleton | 1,428 (94.5%) | 1,428 (94.1%) |
| Twins or multiple | 83 (5.5%) | 89 (5.9%) |
| Placentation1 | ||
| Abnormal2 | 135 (8.9%) | 136 (9.0%) |
| Normal | 1,376 (91.1%) | 1,381 (91.0%) |
| Placenta praevia | 130 (8.6%) | 133 (8.8%) |
| Abnormally invasive placenta | 8 (0.5%) | 4 (0.3%) |
| Pre-eclampsia | 74 (4.9%) | 69 (4.5%) |
| Previous emergency cesarean | 602 (39.8%) | 633 (41.7%) |
| Previous elective cesarean | 241 (15.9%) | 231 (15.2%) |
| Placental abruption | 3 (0.2%) | 2 (0.1%) |
| Ethnicity | ||
| White | 1,213 (80.3%) | 1,219 (80.4%) |
| Mixed | 23 (1.5%) | 14 (0.9%) |
| Asian or Asian British | 158 (10.5%) | 173 (11.4%) |
| Black or Black British | 67 (4.4%) | 71 (4.7%) |
| Other | 50 (3.3%) | 40 (2.6%) |
| Parity | ||
| 0 | 571 (37.8%) | 583 (38.4%) |
| 1 | 556 (36.8%) | 562 (37.0%) |
| 2 | 240 (15.9%) | 238 (15.7%) |
| 3+ | 144 (9.5%) | 134 (8.8%) |
Data presented are n (%) or mean (SD) [n missing].
1Used as a stratification factor in randomisation (along with treatment centre).
2Placenta praevia and/or abnormally invasive placenta.